How to get data from textfield from an other class

Question

Hello everyone,
I have a problem with an application I am writing for school. I want to get the data from a textfield into an other class.
I have two classes: KlantGui and KlantMenuGui
Some Codes from KlantGui:
public String klantNummer;
//knr
knr = new JTextField(10);
p2.add(knr);
//getValue
public String getValue() {
     return knr.getText();
//getKlantNummer
public String getKlantNummer(){
     klantNummer = getValue();
     return klantNummer;
}And this one is from KlantMenuGui:
private KlantGui kg = new KlantGui();
//This is where I want the data to display
String klantnr = kg.getKlantNummer();
p2.add(new JLabel (" Klantnr: "));
tf4 = new JTextField (10);
p2.add(tf4);
tf4.setEditable(false);
tf4.setText(klantnr);I don't know why but it seems like the getValue() doesn't sends the data. For example if I write klantNummer = "2" instead of klantNummer = getValue(); it does work and I see 2 in the other class.
Thanks!

Answer 1

Does knr ever get populated?
From the code below, you create an instance of a KlantGui, but this will have no values set, then straight away call getValue, which returns "", which is correct since the textfield for the instance of KlantGui just created would be empty?